a{
  @include transition(
      background-color .15s ease-in-out,
      border-color .15s ease-in-out,
      color .15s ease-in-out);
}

.btn{
  @include transition(background-color .15s ease-in-out, border-color .15s ease-in-out);
}

.form-control{
  @include transition(border-color .15s ease-in-out, background-color .15s ease-in-out);
}